<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Document</title>
    </head>

    <body>
        <script>
            // 使用for循环 - 求出数组元素的和 [5, 8, 9, 2, 1, 5]

            let num = [5, 8, 9, 2, 1, 5];
            let sum = 0;
            for (let i = 0; i < num.length; i++) {
                sum += num[i];
            }
            document.write(`数组元素的和为：${sum}`);
        </script>
    </body>
</html>
